#304286
Closest named color: Cobalt (#1E488F). oklch(40.3% 0.116 269.5), rgb(48, 66, 134).
Aa
White text reads best on this color (9.33:1).
About this color
#304286 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.116 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.025 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #304286 |
| RGB | rgb(48, 66, 134) |
| HSL | hsl(227, 47%, 36%) |
| OKLCH | oklch(40.3% 0.116 269.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #304286 | 9.33:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #304286 | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #304286 text on white | 9.33:1 | AAA | Lc 91.3 | Preferred for body text |
| #304286 text on black | 2.24:1 | Fails | Lc -11.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AFBFED
oklch(80.8% 0.068 269.9)
-
Step 400
400
#869DE4
oklch(70.7% 0.108 269.8)
-
Step 500
500
#6883DD
oklch(63% 0.139 269.5)
-
Step 600
600
#516BCA
oklch(55.6% 0.15 269.5)
-
Step 700
700
#4259AF
oklch(49.2% 0.139 269.5)
-
Step 800
800 (this color)
#304286
oklch(40.3% 0.116 269.5)
-
Step 900
900
#2F3E71
oklch(37.8% 0.089 269.4)
-
Step 950
950
#1B2442
oklch(26.9% 0.057 269.6)
#304286 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #1E4B88 | 0.028 |
| Deuteranopia (no green cones) | #0B4385 | 0.032 |
| Tritanopia (no blue cones) | #00525D | 0.100 |
| Achromatopsia (no color) | #474747 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304286
#304286
oklch(40.3% 0.116 269.5)
- #5A4500
#5A4500
oklch(40.2% 0.082 88.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #304286, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Dark Slate Blue #483D8B ΔE 0.038
- Twilight Blue #0A437A ΔE 0.040
- Blueberry #464196 ΔE 0.042
- Light Navy #155084 ΔE 0.044
- Dusk Blue #26538D ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.058
- Twilight #4E518B ΔE 0.064
Use #304286 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.